Reply #84: Did selectrics have interchangable font heads in 1974?

[Pobeka]

My memory says I didn't see those interchangeable heads until the late 1970's.

Is my memory correct?

On edit: No, my memory is not correct. Selectrics were around in the 1960's.

But I find it strange that for this type of letter you'd stop after typing the date and address, and switch to a different "typeball" as they called them. Do any other folks with military documents from that era have evidence of switching fonts in the middle of a standard "form letter" as we'd call it today?

http://en.wikipedia.org/wiki/IBM_Selectric_typewriter